Chapter-07: Properties of Matter

After studying this unit, the students will be able to:

• State kinetic molecular model of matter (solid, liquid and gas forms).
• Describe briefly the fourth state of matter, i.e plasma.
• Define the term density.
• Compare the densities of a few solids, liquids and gases.
• Define the term pressure (as a force acting normally on unit area).
• Explain how pressure varies with force and area in the context of everyday examples.
• Explain that the atmosphere exerts a pressure.
• Describe how the height of a liquid column may be used to measure the atmospheric pressure.
• Describe that atmospheric pressure decreases with the increase in height above the Earth's surface.
• Explalin that changes in atmospheric pressure in a region may indicate a change in the weather.
• State Pascal's law.
• Apply and demonstrate the use with examples of Pascal\'s law.
• State relation for pressure beneath a liquid surface to depth and to density.
• State Archimedes principle.
• Determine the density of an object using Archimedes principle.
• State the uphtrust exerted by a liquid on a body.
• State principle of floatation
• State Hooke's law and explain elastic limit.

Multiple Choice Questions
1.	The property of the matter due to which it restores its size and shape when force ceases to act on it:
	a. Inertia	b. Elasticity
	c. Permittivity	d. Rigidity
2.	The force that acts on unit area of an object and thus changes its shape or size:
	a. Stress	b. Strain
	c. Yong’s Modulus	d. Elastic limit
3.	In system international, the unit of stress is:
	a. Nm-2	b. Nm-1
	c. Nm	d. None of above
4.	The ratio of change in length to the original length is:
	a. Stress	b. Tensile strain
	c. Young’s Modulus	d. Elastic limit
5.	When stress is increased, the strain also goes on:
	a. Decreasing	b. Increasing
	c. Constant	c. All of above
6.	The law about stress and strain is presented by:
	a. Hook	b. Newton
	c. Joule	d. Archimedes
7.	According to Hooke’s law, within the elastic limit stress and strain has _______ proportion:
	a. Inverse	b. Direct
	c. Same	d. None of above
8.	The ratio of tensile stress and tensile strain is:
	a. Variable	b. Pascal’s law
	c. non-uniform	d. None of above
9.	The unit of Young’s modulus is:
	a. Nm-2	b. Nm-1
	c. Nm	d. None of above
10.	The force exerted perpendicularly on unit area of an object is called:
	a. Strain	b. Constant
	c. Pressure	d. Work
11.	The unit of pressure is:
	a. Nm-2	b. Nm-1
	c. Pa	d. Both a & c
12.	Pressure depends upon:
	a. Density	b. Depth
	c. Temperature	b. Both a & b
13.	If a body is at a depth of ‘h’ from the liquid surface of density ‘p’ then the pressure ‘P’ on that body is:
	a. P = w/t	P = pgV
	c. P = pgh	d. P = F/a
14.	The law about pressure on the object is presented by:
	a. Joule	b. Pascal
	c. Newton	d. Galileo
15.	Hydraulic press is based on:
	a. Joule’s law	b. Pascal’s Law
	c. Newton’s law	b. Young’s Modulus
16.	If pressure is exerted on a liquid, liquid transmits it:
	a. Variably	b. Equally
	c. In all directions	d. Both b & c
17.	Hydraulic brake works on the principle of:
	a. Hydraulic press	b. Pascal’s Law
	c. Joule’s law	d. Both a & b
18.	______ tells about the floating and sinking of objects:
	a. Pascal’s law	b. Newton’s Law
	c. Archimedes principle	d. None of them
19.	Due to pressure difference on an object, an upward force acts on the object known as:
	a. Weight	b. Buoyant force
	c. Stress	d. All of above
20.	Buoyant force is equal to the _____ of the liquid displaced by the object:
	a. Volume	b. Density
	c. Weight	d. All of above
21.	The object will float on the liquid surface when:
	a. W > F	b. W < F
	c. W = F	d. None of above
22.	The object will sink in the liquid surface when:
	a. W > F	b. W < F
	c. W = F	d. None of above
23.	Submarine works on the principle of:
	a. Pascal’s law	b. Newton’s Law
	c. Archimedes principle	d. None of them
24.	When temperature of the gas increases, gas pressure ________:
	a. Increases	b. Decreases
	c. Remains same	d. None of them
25.	If quantity of the gas is increased hi the container then gas pressure ________:
	a. Increases	b. Decreases
	c. Remains same	d. None of above
26.	According to Kinetic Molecular theory, gases exert pressure on the walls of the container due to their:
	a. Weight	b. Mass
	c. Collisions	d. All of above
27.	The molecules of the matter are always remains in the state of:
	a. Rest	b. Plasma
	c. Motion	d. Tension
28.	The energy possessed bv the molecules of the matter is due to its motion:
	a. P.E.	b. K.E
	c. Sound	d. None of above
29.	When temperature of the matter increases, intermolecular forces ________:
	a. Increases	b. Decreases
	c. Remains same	d. None of above
30.	Molecules of which state of matter have strongest attractive for
	a. Solid	b. Liquid
	c. Gases	d. Plasma
31.	How many states of mother are?
	a. 2	b. 3
	c. 4	d. many
32.	Weakest attractive forces are in
	a. solid	b. liquid
	c. gases	d. Plasma
33.	Ionic state of matter is called
	a. gas	b. plasma
	c. liquid	d. none of these
34.	Plasma is
	a. Good conductor	b. Bad conductor
	c. Semi-conductor	d. non conductor
35.	Unit of density
	a. kg m3	b. kg m-2
	c. kg m-3	d. kg m2
36.	Unit of pressure is
	a. Nm-2	b. Pa
	c. Nm	d. Both a & b
37.	The instrument used to measure atmospheric pressure
	a. Colorimeter	b. Hypsometer
	c. Barometer	d. None of these
38.	A solid object is:
	a. Not elastic below the elastic limit	b. Elastic above the elastic limit
	c. Elastic below the elastic limit	d. None of above

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